Only idiots refuse to change their minds.

A friend to all is a friend to none

Above all be of single aim; have a legitimate and useful purpose, and devote yourself unreservedly to it.

It is easy to be brave at a safe distance.

Nothing fixes a thing so intensely in the memory as the wish to forget it.

Don't expect to build up the weak by pulling down the strong.

The best revenge is to be unlike him who performed the injury.

There is a wisdom of the head, and... there is a wisdom of the heart.

Gravity is only the bark of wisdom's tree; but it preserves it

Don't criticize what you don't understand, son. You never walked in that man's shoes.

Although our intellect always longs for clarity and certainty, our nature often finds uncertainty fascinating.

It seems essential, in relationships and all tasks, that we concentrate only on what is most significant and important.

If you are neutral in situations of injustice, you have chosen the side of the oppressor.

I mistrust the judgement of every man in a case in which his own wishes are concerned.

Wrong life cannot be lived rightly.

Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth.

If you don't behave as you believe, you will end by believing as you behave.

The ethos of redemption is realized in self-mastery, by means of temperance, that is, continence of desires.

The only real laughter comes from despair.

Men build too many walls and not enough bridges.

If you don't stand for something you will fall for anything.